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Mechanistic investigation of molybdenum blue method for ...

Influence of ultrasonic waves on phosphate determination by the molybdenum blue method. Microchemical Journal 2002, 73 (3), 273-277. DOI: 10.1016/S0026-265X(02)00086-3. Bin Zhang, H. P. Beck. A RAPID AND SENSITIVE METHOD FOR THE FLUORIMETRIC DETERMINATION OF PHOSPHATE BY FLOW-INJECTION.

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US Patent for Process for the manufacture of stabilized ...

Calcium sulphate produced by reacting crude phosphate with sulphuric acid is washed with aqueous solutions of condensed and complex aluminium fluorides of the general formulae MeAlF.sub.4, Me.sub.2 AlF.sub.5 and Me.sub.5 Al.sub.3 F.sub.14 as well as AlF.sub.3.nH.sub.2 O, in which Me represents an alkali metal, ammonium or thallium-I ion and n is a number between 1 and 9.

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Oligonucleotide synthesis - Wikipedia

In the early 1950s, Alexander Todd's group pioneered H-phosphonate and phosphate triester methods of oligonucleotide synthesis. The reaction of compounds 1 and 2 to form H-phosphonate diester 3 is an H-phosphonate coupling in solution while that of compounds 4 and 5 to give 6 is a phosphotriester coupling (see phosphotriester synthesis below).

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Solubility of calcium oxalate and calcium phosphate ...

This study was designed to investigate in vitro effect of crude extract and fractions of K. odoratissima on kidney stones (calcium oxalate and calcium phosphate). Materials and Methods: A total of 70% ethanolic extract of K. odoratissima was prepared by maceration method followed by liquid–liquid extraction with hexane, chloroform, ethyl ...

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Phosphorus and Nitrogen in Crude Oil - CosmoQuest

By the Redfield Ratio, marine microalgae contains carbon, nitrogen and phosphorus in the ratio C:N:P 106:15:1 (or 117:14:1). Since algae is the source of crude oil, I thought that crude oil would also contain CNP in this ratio. And therefore that crude oil would be a source of nitrate and phosphate. But my study of simple summary material on oil chemistry does not discuss this, as far as I ...

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REMOVAL OF LEAD FROM CRUDE ANTIMONY BY USING NaPO .

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In order to solve the shortcomings when removing lead from crude antimony in the traditional antimony smelting, a new process was provided using NaPO3 as lead elimination reagent to yield phosphate slag, and it was removed by floating on the surface of the liquid antimony. Reaction mechanism was clarified by using the TG-DTA and XRD techniques ...

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Energies | Free Full-Text | Feedstock-Dependent Phosphate ...

Nonetheless, there appears to be a strong tendency to recover phosphates with the PSS bio-crude. As mentioned, a substantial load of particles with a mean diameter of 38 µm were impurifying the crude oil. Therefore, the phosphate remains in mineral form and can be filtered from the crude oil. The data for nitrogen also provided an acceptable ...

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7. ANALYSIS OF CARBOHYDRATES - UMass Amherst

Crude Fiber Method. The crude fiber method gives an estimate of indigestible fiber in foods. It is determined by sequential extraction of a defatted sample with 1.25% H 2 SO 4 and 1.25% NaOH. The insoluble residue is collected by filtration, dried, weighed and ashed to correct for mineral contamination of the fiber residue.

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Wet grinding method for crude phosphate rock - CF ...

12/09/1978 · The method of wet grinding crude phosphate rock containing clay minerals or like siliceous impurities, which comprises the steps of: introducing coarsely sized, crude phosphate rock containing clay minerals or the like into a grinding mill with at least about 20% by weight of water; introducing a substantially calcium-free alkaline additive ...

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A comparison of sugar indicators enables a universal high ...

15/06/2008 · A systematic comparison of six sugar indicators for their sensitivity, specificity, cross reactivity and suitability in the context of crude lysates revealed para-hydroxybenzoic acid hydrazide (pHBH) to be best suited for application in a plate-based phosphatase-assisted universal sugar-1-phosphate nucleotidyltransferase assay.The addition of a general phosphatase to .

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Phosphate Test Kit at Thomas Scientific

Phosphate Test Kit found in: Phosphate Test Kit, Phosphate Test Kit, Low Range Phosphate Test Kit, Nitrate And Phosphate Combination Test Kit, Test Kit, Po..

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Determination of Moisture of Fertilizers

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The method has been determined to be fast, relatively simple cost-effective and requires only moderately expensive laboratory equipment. The method would be used in an arbitration case where moisture content of phosphate or potassium chloride fertilizers is in dispute.

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Refined New Technology and Its Application Based on the ...

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crude iodine need refined into a w of 99.5% or more pure iodine. This paper briefly introduces the phosphate rock associated iodine recycling method, is described in detail sublimation method refining technology and operation method of the iodine analyzes the problems existing in the production and puts forward corresponding solving measures.

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A Guide To Kjeldahl Nitrogen Determination Methods and ...

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Since 1883, the Kjeldahl method has gained wide acceptance and is now used for a variety of applications. Kjeldahl nitrogen determinations are performed on food and beverages, meat, feed, grain, waste water, soil and many other samples. The method has been refined and tested for a wide variety of substances and approved by various scientific

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Solubility of calcium oxalate and calcium phosphate ...

This study was designed to investigate in vitro effect of crude extract and fractions of K. odoratissima on kidney stones (calcium oxalate and calcium phosphate). Materials and Methods: A total of 70% ethanolic extract of K. odoratissima was prepared by maceration method followed by liquid–liquid extraction with hexane, chloroform, ethyl ...

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phosphate | Sigma-Aldrich

Summary: Phosphomannose isomerase catalyzes the interconversion of fructose-6-phosphate and mannose-6-phosphate and plays a critical role in maintaining the supply of D-mannose derivatives, which are required for most glycosylation reactions. Mutations in the MPI gene were found in patients with carbohydrate-deficient glycoprotein syndrome ...

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US4113184A - Wet grinding method for crude phosphate rock ...

This application discloses a method of wet grinding crude phosphate rock containing clay minerals and the like impurities. The procedures of the invention produce a rock slurry of enhanced fluidity and a desired degree of economy; and the principles of the invention may be applied to rock slurries after size-reduction. The method of the invention contemplates introducing coarsely sized, crude ...

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Determination of organophosphorus pesticide residues in ...

The LOD values for dichlorvos, dimethoate, and malathion with crude ANAE were lower than the standard for the maximum residue limits (MRLs) for pesticides in food (GB 2763-2005), whereas the method did not exhibit sufficient sensitivity for detecting methamidophos and phoxim and thus cannot be used to determine whether the residues of ...

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Determination of Phosphorus in Soil by ICP-OES Using an ...

In this study, an improved standard addition method (ISAM) was developed for the determination of phosphorus in soil by ICP-OES based on the conventional standard addition method (CSAM) and calibration curve method (CCM). Certified standard soils were analyzed by the proposed ISAM method. The values obtained by ISAM method agreed with the certified values. Additionally, the results .

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Method 365.3: Phosphorous, All Forms (Colorimetric ...

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2.0 Summary of Method 2.1 Ammonium molybdate and antimony potassium tartrate react in an acid medium with dilute solutions of phosphorus to form an antimony-phospho-molybdate complex. This complex is reduced to an intensely blue-colored complex by ascorbic acid. The color is proportional to the phosphorus concentration.

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BIOREMEDIATION OF A CRUDE OIL - POLLUTED SOIL BY ...

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Bioremediation is a useful method for soil remediation, ... bioremediation of a crude oil-polluted agricultural soil was evaluated by Ayotamuno et al., (2006). They found that the quantities of fertilizer (NPK) (i.e. 4.7 to 12.5ton/ha), moisture content between 14% and 19% during the wet season and a tillage rate between 2 and 5 times a week, are necessary for an effective bioremediation. The ...

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